Apparatus for treating sheet material



Ap 1947. M. J. FRIEDMAN ,1

APPARATUS FOR 'rnsnmesmala'r MATERIAL Filed Jan; :18, 1945' a! v z;

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Patented Apr. 15, 1941 APPARATUS FOR TREATING SHEET MATERIAL Murray J. Friedman, Northampton, Mass.

Application January 18, 1945, SerialNo. 573,402

This invention. relates to improvements in 9.1)- paratus for treating sheets of material.

The principal objects of the invention are directed to apparatus for treating sheet material such as plywood or other substantially rigid o semi-rigid material of various thicknesses.

While the invention is adapted for broad application, it is particularly useful for treating plywood. It is desired and necessary to treat plywood with a preservative liquid, paint, or the like and according to special features of the invention this is accomplished easily and readily in such a way as to eliminate excessive labor costs and the waste of materials with which the plywood is treated.

It is a special feature of the invention to provide an apparatus which is so arranged and constructed as to facilitate the'passage of sheets of plywood or the like therethrough for the treatin operation thereby to obtain eiiiciency and speed in the operation The apparatus of the invention is characterized by spaced pairs of cooperating pressure rolls .between which the material is passed. Said pairs of rolls are so disposed relative to a tank from which at least some of the liquid for treating the "plywood is withdrawn and applied to plywood that excess liquid is returned to the tank. Means is provided for removing excess treating liquid from the sheets all to the end that the plywood is not only given the desired treatment but excess treating liquid is saved.

1 Claim. (Cl. 91-18) With the foregoing and various other novel fea- I combination and arrangement of parts as will be hereinafter more particularly pointed out in the claim hereunto annexed and more fully described and referred to in connection with theaccompanying drawings wherein:

Fig. l is a side elevational view oi. an apparatus for treating sheet material embodying the novel features of the invention; and

' Fig. 2 is a partial sectional plan view taken on :a plane extending between the rolls of the pairs 'of the apparatus shown in Fig. 1.

Referring now to the drawings more in detail, the invention will be fully described. It willbe understood while reference is made herein to Y plywood that the apparatus is adapted for use in connection with other materials'as well.

- A tank 2 is provided which has end walls 4, side walls 6 and a bottom wall 8. Said tank may be 65 liquid or the like.

made from wood or metal or from wood lined with metal, all as may. be desired. Brackets ID are secured to opposite side walls 6' in spaced relation and adjacent the end walls 4. Guides I! extend upwardly from the brackets I0 and are in spaced relation as shown. Lower roll supports M are slidable on the guides l2 as are upper roll supports l6. Lower springs E8 on the guides I: are disposed between the lower roll supports l4 and brackets I 0. Lower rolls 29 have their shafts 22 journalled in the members 14 and upper rolls 24 have their shafts 26 journalled in the upper members Hi.

Upper springs 28 on the guides are disposed between nuts 30 in threaded engagement with the guides and the upper members I6. Upper members 32 may extend between the guides l2 and a hood 34 may be carried between upper ends of the guides l2, as shown. Sprockets 3d are fixed to the shafts 22 of the lower rolls 20 which Thelower members M are yieldingly supported by the springs I8 and the upper members l6 are urged downwardly by the springs 28 so that the rolls 20 and 26 of a pair are adapted to yieldingly engage a sheet of material such as plywood so and feed the same through the apparatus. The nuts 30 may be adjusted to vary the spring pressure.

The apparatus may be driven in any well known manner but for illustrative purposes, a motor 52 is shown which may have a reducing unit M provided with driving pulley 56 on its shaft. A pulley 68 on a shaft of one of the lower rolls 20 is connected by a'belt SE to the motor pulley 46 so that when the motor 62 is in operation the lower rolls of each pair is driven.

"-A preservative liquid, paint or the like, may be applied to opposite sides of the sheet 40 various ways but for illustrative purposes there is shown a pair of spaced transverse conduits 52 which have .their opposite ends connected together by a swivel 1 construction such as 54. These swivel constructions are mounted at opposite sides of the tank in brackets 66 secured to and extending upwardly from the side walls 6. The conduits may swing so that they may be located at various distances from the sheet 40 as it passes through the apparatus and each conduit may be provided with a plurality of outlets. or nozzles 58, as may be desired.

The conduits 52 are connected by a pipe to means for providing a supply or preservative In the form 01' the invention shown said connection 60 is connected to a pump indicated by 62-which has its suction 64 extending into the tank. There may be a filter or strainer associated with the connection 64 if desired. A pulley G8 on the motor shaft is connected by a belt 10 to a pulley 12 of the pump 62 'for operating the same.

Brackets 80 are secured to and extend upward- 1y from opposite side walls 6 and have upper and lower trunnions 82 journalled therein. Transverse members 84 which may be in the form of angle irons-are fixed to the trunnions 82 and have extending therefrom wipers 86. Said wipers are preferably more or less yieldable or flexible and may be made from leather, rubber, composition or the like. Adjusting screws 83 are for holding the wipers in adjusted position. These wipers are for wiping excess liquid from a sheet as it passes therebetween.

In operation and with the lower rolls being rotated as described the forward end of a sheet indicated by 40 is passed between the left hand pair of rolls which engage and feed it to the right hand pair of rolls. In this way the sheet is passed through the apparatus. The conduits 58 are adjusted, as may be desired, and the liquid whether apreservative, paint or the like is applied'to opposite sides of the sheet as it passes through the apparatus. Excess liquid is wiped off the sheet by the wipers 86 and it falls into the tank. The hood 34 is intended and is so constructed and arranged as to collect liquid being sprayed upwardly so that it will fall into the tank.

The nuts 30'may be adjusted to obtain any desired pressure between the-rolls of the pairs thereof. The tank may be of any dimensions desired, the spacing of the pairs of the rolls may be varied to accommodate sheets of any desired length, and various means may be employed for applying liquid to the sheet..

The form of the invention being shown is intended to enable oneskilled in the art to make such changes and modifications as may be desired in order to adapt the apparatus for various purposes.

The invention may be embodied in other specific forms without departing from the essential characteristics thereof. Hence, the present embodiments are therefore to be considered in all respects merely as being illustrative and not as being restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all modifications and variations as fall within the meaning 4 and purview and range of equivalency of the appended claim are therefore intended to be embraced therein.

v 4 What it is desired to claim and secure by Letters Patent of the United States is: Apparatus for treating sheets of ply wood and the like comprising in combination, a tank for liquid having opposite longitudinal side walls,

brackets secured to said side walls at opposite ends thereof, spaced guides arranged in pairs and extending upwardly from each bracket providing pairs of guides at each side of the tank at opp ite ends thereof, lower springs on'th guides of each pair thereof, lower roll supports having opposite ends slidable on the pairs of guides yieldingly. supported by said springs. lower rolls journalled in the lower roll'supports at opposite ends of the tank and extending thereacross, upper roll supports having opposite ends slidable on the pairs of guides above said lower roll supports, abutments adjustable on the upper ends of said guides, springs between said abutments and upper roll supports yieldingly resist-,

ing upward movements of said supports, upper rolls joumalled in said upper roll supports providing with said lower rolls pairs of cooperating rolls which are yieldingly separable to receive sheets of ply wood and the like, driving connections between the lower rolls of the pairs thereof and means for driving one of lower said rolls, means disposed transversely of said tank between said brackets for applying treating liquid to opposite sides of a sheet being fed by said pairs of rolls, and means at one end of said tank for engaging opposite sides of a sheet for removing excess liquid therefrom, all adapted and arranged whereby said pairs of rolls frictlonally engage opposite faces of a sheet with predetermined pressure for feeding the same longitudinally of said tank and relative to said liquid applying and removing means while either pair of rolls may move upwardly or. downwardly relative to the other pair while maintaining said yielding pressure. I

I MURRAY J. FRIEDMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Hamilton Aug. 22, 1944 

